TM 9-2549-3. Cleaning Optical Components - ContinuedTable 9-1. Special Tools and SuppliesNomenclatureDescriptionAlcohol, denatured0E760Acetone, technicalLens tissue7-1/2 X 11 inch sheets, NNN-P-40Stainless steel pump dispenserLens cleaning compoundDetergent solution, MIL-C-43454SyringeBulb type, 6515-X29-3340Artist brushNumber 6Suction adapterFabricated, teflon or bakeliteLens tongsApplicatorFabricated, wood or fiberglassRapping stickLens tray(1)For initial cleaning of a component after removal from an instrument or lens cell, use a syringe or a camel hairbrush to remove any dirt which may have fallen on the lens during removal. Then apply alcohol to a pad ofcheesecloth or lens tissue and clean the component thoroughly. A light pressure should be applied to the surfaceof the component when cleaning. Using excessive pressure could possibly damage the coating or put scratchesin the glass.(2)For final cleaning prior to installation of a lens in a cell or instrument, place the lens on a lens holder or a vacuumsuction adapter (Fig. 9-20). Wrap a small piece of lens tissue around and over the end of a wood or fiberglassapplicator (Fig. 9-21). Make sure you leave a cushioned tip over the end of the applicator so that it does not marthe lens surface. Moisten the lens tissue with acetone and proceed to clean the lens by rotating the applicator ina circular motion starting at the center of the lens and cleaning outward to the edge of the lens (Fig. 9-22).Repeat the above operation until the lens is free of dirt. Lift lens from suction adapter, clean the top of theadapter, turn lens over and repeat the cleaning operation on the other surface. Before inserting the lens in its cellbe sure the cell has been cleaned of any sealant, washed in Dry Cleaning Solvent (exposed metal) or generalpurpose detergent (painted surface) and dried. Then properly orientate the lens and insert it into its cell. Hold thecell up to the light and visually inspect for dirt or lint. If dirt or lint is present on the lens, use vacuum with properfabricated adapter (fig 9-23) or lens tissue to remove the contamination.9-14 Change 6